Hi.
I have just gotten a lot of goodies for a new PC build. The parts I have are listed below.
CPU: i7 4930K
Memory 64GB Gorsair Vengeance Pro 2400C11R
Motherboard Rampage IV Black Edition
Operating drive: RAIDR Express (Slot 2)
GPU's: 2x Poseidon Platinum GTX 780 in SLI (Slots 1&3)
PSU: Corsair AX1200i
I can't get the system to run 64GB of memory under XMP; the system boots, but then BSOD's on the desktop. It won't run prime 95 with 64GB @ 1600MHz either, in fact, it will only run 64GB @ 1333MHz, and is using 1.3v to do it. This is on a stock multiplier as well! It doesn't matter what I change in the bios, it won't go any higher. I have tested both 32GB kits of this memory on my old Maximus V Gene with an i5 3570k. That CPU ran the memory in XMP, with an overclock of 4.4GHz @ 1.38v, but I was never able to get it to 4.5GHz, even with 8GB @ 1333MHz. The Rampage IV Black and 4930K will run 32GB @ 2400, but again, is using 1.285v, which seems a bit high. I'm pretty sure I just have a dud chip, with a really weak memory controller.
I have got the latest BIOS version; this was the first thing I did after XMP failed. Does anyone have any opinion on this, as I was going to RMA my CPU for this memory problem (as far as I'm aware, it should have no problem running this memory, especially without a multiplyer increase). Is there though, something wrong with my board? Is the board what's stopping the system from running 64GB @ 2400? When the system has booted, I have the Q-code "AA" so it seems fine, but it hasn't "just worked" for me since I got it the other day. I noticed that JJ from ASUS built a similar system, using this board, a 4960X, and 64GB of 2133MHz Memory, so I'm sure mine should be able to run 64GB at more than 1333MHz.
I'll also add, regarding the CPU, that although it's using a high voltage, the temps on each core never exceed 54° when running prime95. This, of course is at 1333MHz, as I can't get it to run anything higher.
Thanks.